Blacksmith and Armoury upgrades (Master Trainer)
The Blacksmith raises a unit's attack and the Armoury its defence, up to level 20. A unit's level cannot be higher than the building's level.
Blacksmith needs Main Building 3 and Academy 3. Armoury needs Main Building 3 and Academy 1.
Upgrades are per village: troops use the levels of the village they come from.
Example: a Legionnaire has 40 attack. At Blacksmith level 10 it has about 46, at level 20 about 52.
Each building runs one upgrade at a time. Master Trainer (10 Gold, 7 days) allows two at once in each Blacksmith and Armoury, in every village.
Chiefs and settlers cannot be upgraded. Rams and catapults upgraded in the Blacksmith also destroy more.
Every troop's info page shows its values at all levels 0-20 and the cost of each upgrade.
